A San Rafael man was arrested on allegations he left a bomb threat in a woman’s mailbox with a demand for $3,000 and nude photos.

Rodger Lee Johnson Jr., 43, appeared in court Wednesday morning to face charges of attempted extortion and criminal threats. His arraignment was delayed until Friday while his public defender reviews the case.

The alleged victim, a resident of the Santa Venetia neighborhood, discovered the note in her mailbox on Friday, according to the Marin County Sheriff’s Office. The note allegedly contained a threat to bomb the woman’s car and harm her and her dog if the demands were not met.

The note also said the sender watches the woman through her window.

The woman identified a possible suspect as a man she knows in the neighborhood. Investigators contacted Johnson and he made incriminating statements, said sheriff’s Lt. Steve de la O.

Investigators found no evidence that he possessed explosives, de la O said.

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Johnson was booked into Marin County Jail with a bail amount of $100,000. He remained in custody Wednesday.

The sheriff’s department is still investigating whether anyone else was involved in the alleged threat.

Investigators also developed information that Johnson allegedly battered and threatened another resident he knows in the neighborhood. As of Wednesday morning, the prosecution had filed no additional charges.